Submission #586723

#	Time	Username	Problem	Language	Result	Execution time	Memory
586723		MDario	Robots (IOI13_robots)	C++11	100 / 100	449 ms	23536 KiB

robots

#include "robots.h"
#include<bits/stdc++.h>
using namespace std;
#define F first
#define S second
int f(int xf[], int yf){
    if(xf[yf]==yf)return yf;
    else return xf[yf]=f(xf, xf[yf]);
}
int putaway(int A, int B, int T, int X[], int Y[], int w[], int s[]) {
    vector<int> x, y;
    for(int i=0; i<A; i++)x.push_back(X[i]);
    x.push_back(0);
    for(int i=0; i<B; i++)y.push_back(Y[i]);
    y.push_back(0);
    sort(x.begin(), x.end());
    sort(y.begin(), y.end());
    pair<int, int> a[T];
    int l, r, m, b[T], b1[A+2], b2[B+2], nexa[A+2], nexb[B+2], c[20];
    for(int i=0; i<T; i++){
        l=0;
        r=A+1;
        while(l+1<r){
            m=(l+r)/2;
            if(w[i]>=x[m])l=m;
            else r=m;
        }
        a[i].F=r;
        l=0;
        r=B+1;
        while(l+1<r){
            m=(l+r)/2;
            if(s[i]>=y[m])l=m;
            else r=m;
        }
        a[i].S=r;
    }
    sort(a, a+T);
    l=0;
    r=T+1;
    while(l+1<r){
        m=(l+r)/2;
        c[1]=0;
        for(int i=0; i<T; i++)b[i]=0;
        for(int i=0; i<=A; i++){
            b1[i]=0;
            nexa[i]=i;
        }
        b1[A+1]=m;
        nexa[A+1]=A+1;
        for(int i=0; i<=B; i++){
            b2[i]=0;
            nexb[i]=i;
        }
        b2[B+1]=m;
        nexb[B+1]=B+1;
        for(int i=T-1; i>=0; i--){
            c[0]=f(nexb, a[i].S);
            if(c[0]!=B+1){
                b[i]=1;
                b2[c[0]]++;
                if(b2[c[0]]==m)nexb[c[0]]=c[0]+1;
            }
        }
        for(int i=0; i<T; i++){
            if(!b[i]){
                c[0]=f(nexa, a[i].F);
                if(c[0]!=A+1){
                    b1[c[0]]++;
                    if(b1[c[0]]==m)nexa[c[0]]=c[0]+1;
                }
                else c[1]=1;
            }
        }
        if(!c[1])r=m;
        else l=m;
    }
    if(r==T+1)return -1;
    return r;
}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 25 / 25
• Subtask 4: 37 / 37
• Subtask 5: 10 / 10